{
    "id": "CVE-2005-3774",
    "published": "2005-11-23 00:03:00",
    "last_modified": "2026-06-16 22:17:36",
    "cvss_score": "5.0",
    "cvss_severity": "MEDIUM",
    "cvss_version": "2.0",
    "cvss_vector": "AV:N/AC:L/Au:N/C:N/I:N/A:P",
    "cwe": null,
    "description": "Cisco PIX 6.3 and 7.0 allows remote attackers to cause a denial of service (blocked new connections) via spoofed TCP packets that cause the PIX to create embryonic connections that that would not produce a valid connection with the end system, including (1) SYN packets with invalid checksums, which do not result in a RST; or, from an external interface, (2) one byte of \"meaningless data,\" or (3) a TTL that is one less than needed to reach the internal destination.",
    "epss_score": "0.18207",
    "epss_percentile": "0.97119",
    "kev": 0,
    "kev_due": null,
    "has_exploit": 1,
    "updated_at": "2026-09-27 18:17:04",
    "priority": {
        "rank": 2,
        "label": "Patch early",
        "why": "A public exploit exists."
    },
    "products": [
        {
            "vendor": "cisco",
            "product": "pix"
        }
    ],
    "kev_detail": null,
    "exploits": [
        {
            "source": "exploit-db",
            "ref_id": "1338",
            "title": "Cisco PIX - Spoofed TCP SYN Packets Remote Denial of Service",
            "date": "2005-11-23",
            "url": "https://www.exploit-db.com/exploits/1338"
        },
        {
            "source": "exploit-db",
            "ref_id": "26548",
            "title": "Cisco PIX - TCP SYN Packet Denial of Service",
            "date": "2005-11-22",
            "url": "https://www.exploit-db.com/exploits/26548"
        }
    ],
    "refs_list": [
        "http://lists.grok.org.uk/pipermail/full-disclosure/2005-November/038971.html",
        "http://lists.grok.org.uk/pipermail/full-disclosure/2005-November/038983.html",
        "http://secunia.com/advisories/17670",
        "http://securitytracker.com/id?1015256",
        "http://www.cisco.com/en/US/products/hw/vpndevc/ps2030/products_security_notice09186a0080624a37.html",
        "http://www.cisco.com/warp/public/707/cisco-response-20051122-pix.shtml",
        "http://www.kb.cert.org/vuls/id/853540",
        "http://www.osvdb.org/24140",
        "http://www.securityfocus.com/archive/1/417458/30/0/threaded",
        "http://www.securityfocus.com/archive/1/426989/100/0/threaded",
        "http://www.securityfocus.com/archive/1/426991/100/0/threaded",
        "http://www.securityfocus.com/archive/1/427041/100/0/threaded",
        "http://www.securityfocus.com/bid/15525",
        "http://www.vupen.com/english/advisories/2005/2546",
        "https://exchange.xforce.ibmcloud.com/vulnerabilities/25077",
        "https://exchange.xforce.ibmcloud.com/vulnerabilities/25079",
        "http://lists.grok.org.uk/pipermail/full-disclosure/2005-November/038971.html",
        "http://lists.grok.org.uk/pipermail/full-disclosure/2005-November/038983.html",
        "http://secunia.com/advisories/17670",
        "http://securitytracker.com/id?1015256",
        "http://www.cisco.com/en/US/products/hw/vpndevc/ps2030/products_security_notice09186a0080624a37.html",
        "http://www.cisco.com/warp/public/707/cisco-response-20051122-pix.shtml",
        "http://www.kb.cert.org/vuls/id/853540",
        "http://www.osvdb.org/24140",
        "http://www.securityfocus.com/archive/1/417458/30/0/threaded"
    ]
}